| Huercal-Overa to Oberkirch | 920.23 mi (1,480.96 km) |
| Huercal-Overa to Obernburg am Main | 1,021.14 mi (1,643.37 km) |
| Huercal-Overa to Obernkirchen | 1,159.19 mi (1,865.54 km) |
| Huercal-Overa to Oberschleissheim | 1,012.84 mi (1,630.00 km) |
| Huercal-Overa to Oberstdorf | 929.56 mi (1,495.98 km) |
| Huercal-Overa to Obertraubling | 1,066.65 mi (1,716.61 km) |
| Huercal-Overa to Obertshausen | 1,025.74 mi (1,650.76 km) |
| Huercal-Overa to Oberursel | 1,026.98 mi (1,652.76 km) |
| Huercal-Overa to Ochsenfurt | 1,036.38 mi (1,667.90 km) |
| Huercal-Overa to Ochsenhausen | 951.17 mi (1,530.76 km) |
| Huercal-Overa to Ochtrup | 1,115.48 mi (1,795.19 km) |
| Huercal-Overa to Odenthal | 1,042.36 mi (1,677.52 km) |
| Huercal-Overa to Oelde | 1,112.37 mi (1,790.18 km) |
| Huercal-Overa to Oelsnitz | 1,137.74 mi (1,831.02 km) |
| Huercal-Overa to Oer-Erkenschwick | 1,082.13 mi (1,741.53 km) |
